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Around 100,000 tonnes of drainage & track renewal materials delivered per year
1 of 1 | Around 100,000 tonnes of drainage & track renewal materials delivered per year

Aggregate Industries is responsible for removing around 80,000 tonnes per annum of waste stone from across the underground system

Key facts

Sector: Railway
Client: London Underground

  • Around 80,000 tonnes removed per annum.
  • Removed material is then recycled
  • 1000,000 tonnes of drainage and track ballast materials delivered each year

Brief

In 2011 London’s train network took the cost cutting decision to manage its track renewal and maintenance programme in-house. As part of this strategic decision, the team set about finding a industry leading partner who could not only manage the controlled disposal and recycling of its waste aggregate, but also provide new materials for its ongoing track maintenance and renewals programme.

The Capital’s underground rapid transit system is a keen advocate of recycling discarded materials and with 250 miles of track joining 287 stations across the capital and key Home Counties, there is a continuous need for the removal of old aggregates and the consumption of new materials.

This vast network of rail lines requires a rolling scheme of major works to ensure it continually meets the pertinent UK rail standards and passenger safety legislation at all times.

To facilitate these works, alongside an emergency repair solution, the operations team manages a vast rail depot in Ruislip, West London where aggregate materials are stored and transported across the city as required.

The successful manufacturing partner would need to be able to keep this facility well stocked with essential aggregates, offer a site waste collection service, as well as provide additional support to the whole London network when further quantities of material are required.

Solution

Following a competitive tender process, it was decided that Aggregate Industries was the partner of choice for both the waste recycling and the aggregate supply aspects of the job.

An initial five year contract was agreed, and Aggregate Industries quickly surpassed client expectations with its logistical solutions, flexible delivery times, recycling capabilities and expert production which make the new materials fit for purpose.

Under this contract, Aggregate Industries is responsible for removing around 80,000 tonnes per annum of waste stone from across the underground system, in line with both the rolling schedule of works and any emergency repairs that take place.

With around 80 per cent of the waste material fit for recycling, it is sorted from the unusable clay-bound waste and re-manufactured to the highest technical standards into a number of different products, including recycled Type 1 Subbase for civil engineering projects and coarse drainage materials for sports pitches.

To replace the material which is removed and recycled, Aggregate Industries delivers around 100,000 tonnes of drainage and track renewal materials such as Granite Track Ballast and Drainage Gravels to the rail storage depots each year, with additional quantities being sent to satellite sites around the clock to facilitate particularly large or emergency works – these deliveries can vary in size dramatically from large scale rail loads to pallets of small 25kg bags, with the market-leading service offering remaining the same each time.

With its high volume capability, various logistical options and technologically advanced processing equipment, Aggregate Industries Isle of Grain production depot plays a key part in the close working relationship the company has with London’s rail network. Not only does Aggregate Industries supply rail consignments of aggregate to Ruislip depot, it also schedules the clients own trains to collect materials on a weekly basis. The new Track Ballast aggregate is produced through a vigorous washing process to help prevent any dust suppression issues developing in the underground tunnels – a real plus point for the client who would otherwise have to manage this risk.

Aggregate Industries is also able to offer well placed additional stocks through its own well placed railhead depots in Acton, West London and Bow, East London. Acton Depot not only serves as the main recycling hub for underground site waste, but also the main distribution point for bagged aggregates, as well as offering an extended tonnage contingency should further volume be required.

The ongoing relationship between Aggregate Industries and the Capital’s below ground rail network, displays the full breadth of the companies capabilities, from the supply of high quality aggregates or round-the-clock logistical solutions, to the removal and processing of waste and the manufacturing of high-specification recycled products.

By drawing on the teams many years of experience within the rail sector, Aggregate Industries is able to continually meet and surpass the client’s expectations and play its part in keeping the capital moving. 

London Underground

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